K Colour

Live pricing and availability for K colour diamonds across natural and lab-grown origins.

Total listings
398,225
Natural median (EUR)
€1,569/ct
Lab-grown median (EUR)
€1,575/ct

What K Colour Means for Buyers

K sits on the GIA colour scale that runs from D (colourless) at the top through to Z (faint yellow or brown). The higher up you go toward D, the rarer the stone and the steeper the price curve. But a huge number of buyers never tell the difference between two adjacent grades in a finished ring, especially once the diamond is mounted in yellow or rose gold.

Right now we're tracking 398,225 active K colour listings across our retailer network. The typical natural K diamond trades around €1,569/ct while the lab-grown equivalent sits at €1,575/ct. Roughly a -0% gap that reflects the broader natural-vs-lab pricing gap, not a quality difference at this grade.

K shows up most often in ROUND. About 222,232 listings at this moment. Followed by OVAL. Most of the supply clusters around the 0.5-0.99ct carat range, where demand is strongest and retailers keep the deepest inventory. If you're shopping an unusual shape or carat, expect thinner selection.

For most engagement-ring buyers, the practical sweet spot for colour is G or H. Colourless-appearing face-up, still a near-colourless grade on paper, and priced 30 to 50% below the D-E tier. If you're setting the stone in yellow or rose gold, you can comfortably go down to I or J without the stone looking warm. Save the money for a better cut grade; cut drives sparkle far more than the last step of colour.

Breakdown by Shape

ShapeOriginListingsMedian (EUR)
ROUNDnatural222,232€1,470/ct
OVALnatural38,187€1,832/ct
PEARnatural28,730€1,628/ct
EMERALDnatural27,990€1,881/ct
ROUNDlab grown21,461€1,552/ct
PRINCESSnatural14,215€1,614/ct
CUSHIONnatural13,795€1,887/ct
HEARTnatural7,055€1,476/ct
MARQUISEnatural6,976€1,684/ct
RADIANTnatural5,847€1,748/ct
ASSCHERnatural4,513€1,602/ct
OVALlab grown2,425€1,836/ct
PRINCESSlab grown1,065€1,615/ct
EMERALDlab grown982€1,588/ct
PEARlab grown938€1,483/ct
OTHERnatural637€2,675/ct
CUSHIONlab grown440€1,262/ct
TRILLIONnatural223€2,476/ct
MARQUISElab grown195€1,373/ct
RADIANTlab grown120€1,906/ct
HEARTlab grown96€1,037/ct
ASSCHERlab grown62€1,293/ct
ROUNDunknown26€1,063/ct
OTHERlab grown22€488/ct
BAGUETTEnatural16€2,350/ct

Breakdown by Carat

CaratOriginListingsMedian (EUR)
0.5-0.99ctnatural107,984€1,199/ct
0.5-0.99ctlab grown9,061€1,381/ct
1.0-1.49ctnatural80,811€1,794/ct
1.0-1.49ctlab grown3,540€1,692/ct
1.0-1.49ctunknown4€2,162/ct
1.5-1.99ctnatural53,491€2,518/ct
1.5-1.99ctlab grown4,077€2,036/ct
2.0-2.99ctnatural31,849€3,944/ct
2.0-2.99ctlab grown5,063€2,423/ct
3.0ct+natural15,408€7,046/ct
3.0ct+lab grown985€3,145/ct
3.0ct+unknown1€19,579/ct
under-0.5ctnatural80,873€1,194/ct
under-0.5ctlab grown5,083€1,041/ct
under-0.5ctunknown24€1,050/ct
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